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首页> 外文期刊>Journal of Asian earth sciences >Heavy metal and clay mineral analyses in the sediments of Upper Gulf of Thailand and their implications on sedimentary provenance and dispersion pattern
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Heavy metal and clay mineral analyses in the sediments of Upper Gulf of Thailand and their implications on sedimentary provenance and dispersion pattern

机译：泰国上海湾沉积物中重金属和粘土矿物分析及其对沉积物源和扩散模式的影响

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摘要

Forty-eight sediment samples collected in the Upper Gulf of Thailand (UGOT) and its nearby rivers including the Mae Klong, Tha Chin, Chao Phraya, and Bang Pakong were analyzed for grain size, heavy metals (Cu, Pb, Zn, Cr, and Cd), and clay minerals. The results reveal that fine-grained sediments with Mz < 30 mu m concentrate in the northern coastal area and coarse-grained fractions increase in a seaward direction. The grain size of the sediments mainly controls heavy metal concentrations. The concentrations of Cu, Pb, Zn, and Cr are higher in the northern part of UGOT, with ranges above 20, 23, 45, and 50 mg kg(-1), than in other sampling areas. Meanwhile, Cd content is greater than 120 mu g kg-(1) in sediments near the Bang Pakong River mouth and area between the Tha Chin and Mae Klong rivers mouth. The concentrations of heavy metals are higher than background data, and statistical analysis of geo-accumulation index indicates that the study area is either unpolluted to moderately polluted or moderately polluted by heavy metals. Our results also verify that illite is the dominant clay mineral, followed by kaolinite, chlorite, and smectite in terms of semi-quantitative content. Smectite/kaolinite can be used as an indicator to trace the riverine sediment in the study area, which present a counterclockwise dispersion pattern of sediment from the Chao Phraya River. (c) 2015 Elsevier Ltd. All rights reserved.
机译：分析了在泰国上海湾（UGOT）及其附近的河流（包括湄公河，塔钦，湄南河和邦帕孔）收集的48个沉积物样本的粒度，重金属（铜，铅，锌，铬，和Cd），以及粘土矿物。结果表明，Mz <30μm的细粒沉积物集中在北部沿海地区，粗粒级分向海方向增加。沉积物的晶粒大小主要控制重金属的浓度。 UGOT北部的Cu，Pb，Zn和Cr浓度高于其他采样区域，范围在20、23、45和50 mg kg（-1）以上。同时，Bang Pakong河口附近和Tha Chin和Mae Klong河口之间的区域中的沉积物中Cd含量大于120μgkg-（1）。重金属的浓度高于背景数据，地理累积指数的统计分析表明，研究区域未受到重金属的污染或中等污染。我们的结果还证实，伊利石是主要的粘土矿物，其半定量含量依次为高岭石，绿泥石和蒙脱石。蒙脱石/高岭石可用作指示研究区域中河流沉积物的指示剂，这些沉积物呈逆时针方向分布在湄南河中。 （c）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Journal of Asian earth sciences》 |2015年第3期|488-496|共9页
  • 作者

    Qiao Shuqing; Shi Xuefa; Fang Xisheng; Liu Shengfa; Kornkanitnan Narumol; Gao Jingjing; Zhu Aimei; Hu Limin; Yu Yonggui;

  • 作者单位

    State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China;

    State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China;

    State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China;

    State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China;

    Marine & Coastal Resources Res Ctr, Dept Marine & Coastal Resources, Muang 7400, Samut Sakhon, Thailand;

    State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China;

    State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China;

    State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China;

    State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Sediment source; Metals; Clay minerals; Chao Phraya River; Human activities;

    机译：沉积物来源;金属;粘土矿物;湄南河;人类活动;

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